Branched-chain amino acid catabolism rather than amino acids plasma concentrations is associated with diet-induced changes in insulin resistance in overweight to obese individuals

verfasst von

S. Haufe, S. Engeli, J. Kaminski, H. Witt, D. Rein, B. Kamlage, W. Utz, J. C. Fuhrmann, V. Haas, A. Mähler, J. Schulz-Menger, F. C. Luft, M. Boschmann, J. Jordan

Abstract

Background & aims 3-Hydroxyisobutyrate (3-HIB), a catabolic intermediate of the BCAA valine, which stimulates muscle fatty acid uptake, has been implicated in the pathogenesis of insulin resistance. We tested the hypothesis that circulating 3-HIB herald insulin resistance and that metabolic improvement with weight loss are related to changes in BCAAs and 3-HIB. Methods and results We analyzed plasma and urine in 109 overweight to obese individuals before and after six months on hypocaloric diets reduced in either carbohydrates or fat. We calculated the homeostasis model assessment index (HOMA-IR) and whole body insulin sensitivity from oral glucose tolerance tests and measured intramyocellular fat by magnetic resonance spectroscopy. BCAAs and 3-HIB plasma concentrations were inversely related to insulin sensitivity but not to intramyocellular fat content at baseline. With 7.4 ± 4.5% weight loss mean BCAA and 3-HIB plasma concentrations did not change, irrespective of dietary macronutrient content. Individual changes in 3-HIB with 6-month diet but not BCAAs were correlated to the change in whole body insulin sensitivity and HOMA-IR independently of BMI changes. Conclusions 3-HIB relates to insulin sensitivity but is not associated with intramyocellular fat content in overweight to obese individuals. Moreover, changes in 3-HIB rather than changes in BCAAs are associated with metabolic improvements with weight loss. Registration number for clinical trials: ClinicalTrials.gov Identifier: NCT00956566.

Externe Organisation(en)

Medizinische Hochschule Hannover (MHH)
Max-Delbrück-Centrum für Molekulare Medizin (MDC) in der Helmholtz-Gemeinschaft
Metanomics Health GmbH
HELIOS Klinikum Berlin-Buch
Universität zu Köln
Charité - Universitätsmedizin Berlin

Typ

Artikel

Journal

Nutrition, Metabolism and Cardiovascular Diseases

Band

27

Seiten

858-864

Anzahl der Seiten

7

ISSN

0939-4753

Publikationsdatum

10.2017

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Medizin (sonstige), Endokrinologie, Diabetes und Stoffwechsel, Ernährung und Diätetik, Kardiologie und kardiovaskuläre Medizin

Ziele für nachhaltige Entwicklung

SDG 3 – Gute Gesundheit und Wohlergehen

Elektronische Version(en)

https://doi.org/10.1016/j.numecd.2017.07.001 (Zugang: Geschlossen)